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Journal of Zhejiang University SCIENCE A 2011 Vol.12 No.9 P.720-730

http://doi.org/10.1631/jzus.A1000485


Temperature and thermodynamic deformation analysis of the rotors on a twin screw multiphase pump with high gas volume fractions


Author(s):  Tie-yu Gao, Dong-fang Yang, Feng Cao, Jin-cheng Jiao

Affiliation(s):  School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China

Corresponding email(s):   fcao@mail.xjtu.edu.cn

Key Words:  Multiphase pump, Twin screw rotor, Thermal deformation, Finite element analysis


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Tie-yu Gao, Dong-fang Yang, Feng Cao, Jin-cheng Jiao. Temperature and thermodynamic deformation analysis of the rotors on a twin screw multiphase pump with high gas volume fractions[J]. Journal of Zhejiang University Science A, 2011, 12(9): 720-730.

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author="Tie-yu Gao, Dong-fang Yang, Feng Cao, Jin-cheng Jiao",
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doi="10.1631/jzus.A1000485"
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%T Temperature and thermodynamic deformation analysis of the rotors on a twin screw multiphase pump with high gas volume fractions
%A Tie-yu Gao
%A Dong-fang Yang
%A Feng Cao
%A Jin-cheng Jiao
%J Journal of Zhejiang University SCIENCE A
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%@ 1673-565X
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%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1000485

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J0 - Journal of Zhejiang University Science A
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DOI - 10.1631/jzus.A1000485


Abstract: 
The pressure increasing process within a twin screw multiphase pump, under the condition of high gas volume fractions (GVFs), induces large temperature and pressure changes that cause the rotors to deform. Rotor deformations heavily influence the backflow of the multiphase fluid through clearances within the twin screw multiphase pump and these deformations may even lead to pump failures. An accurate temperature and pressure distribution on the screw rotors need be obtained before the deformation analysis can be carried out. By means of small temperature and pressure sensors embedded into the groove at the root of the rotors, the temperatures of 12 points on the rotors and the pressure distributions of a twin screw multiphase pump under high GVFs conditions were recorded. Temperature test results were adopted to perform a heat transfer analysis for determining the temperature distribution on the screw rotors. Then deformation analyses, including thermal deformation, force deformation, and total deformation, were conducted according to the pressure and temperature distributions. Deformation analysis for different materials was also conducted under the same boundary conditions. A material was suggested for the manufacturing of rotors in a twin screw multiphase pump under the condition of high gas volume fractions.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article

Reference

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